Definition of laevorotatory in English:

laevorotatory

(US levorotatory)

adjective

Chemistry
  • (of a compound) having the property of rotating the plane of a polarized light ray to the left, i.e. anticlockwise facing the oncoming radiation.

    The opposite of dextrorotatory
    • ‘Hence this appeal to gastropodologists, if such a term exists, to come to the rescue and explain the unique (laevorotatory) development of the humble periwinkle.’
    • ‘The chemical structure of the natural form of ephedrine is levorotatory, while the synthetic ephedrine is a racemic mixture.’
    • ‘Morphine is an amphoteric pentacyclic alkaloid that exists naturally in its levorotatory form as columnar colorless prisms.’

Pronunciation:

laevorotatory

/ˌliːvəʊˈrəʊtət(ə)ri/